In a certain code language, 'her father is okay' is coded as 6583, 'my father is well' is coded as 5137 and 'her arm is injured' is coded as 2839. How will 'okay' be coded in that language ?

6

Given; In a certain code language, 'her father is okay' is coded as 6583, 'my father is well' is coded as 5137 and 'her arm is injured' is coded as 2839.

So,

her  father  is  okay  =  6  5  8  3

my  father  is  well  =  5  1  3  7

her  arm  is  injured  =  2  8  3  9

Thus,

Code for her is 6, father is 5, "is" is 3

And,

Code for okay is 6.